†family Orthorhynchulidae Cooper 1956 (lamp shell)
Rhynchonellata - Rhynchonellida - Orthorhynchulidae
Parent taxon: Rhynchotrematoidea according to A. Williams et al. 2002
See also Rõõmusoks 1964
Sister taxa: Leptocoeliidae, Machaerariidae, Phoenicitoechiidae, Rhynchotrematidae, Trigonirhynchiidae, Trigonorhynchiidae
Subtaxa: Orthorhynchula Orthorhynchuloides Orthorhynchyllion Tasmanella Tuvaerhynchus
Type: Orthorhynchula
Ecology: stationary epifaunal suspension feeder
Distribution: